Post by Slinger on Sept 23, 2021 15:05:49 GMT
I. don't. want. to. go. overboard. but...
I have to take into account that although an optical cable will not need "burning in" my DAC hasn't yet got many hours on it, and so, technically at least, it's going to get even better.
I bunged my favourite Rostropovich JS Bach Cello Suites on and it sounded rather good. It's lost some of the "rawness" I usually associate with the recording and has become a tad more polite. although not in a bad way. I think I'd just got used to hearing it the other way.
This new sound makes me smile.
At least, it does now that I've unleashed my secret weapon. I've rewritten the Volumio config.txt for the Pi4 with the help (all right, technically I cribbed some of his work) of our old mate Archimago. One extra I added myself was the shutting down of the USB ports as I'm not using them. Everything is throttled back and it was the extra 5% I wanted.
For anyone with a Pi4 who wants the new config.txt, here it is.
More info here: archimago.blogspot.com/2020/10/musingshow-to-raspberry-pi-4-touch.html
If you're tempted to give it a go don't forget that if you're using a USB DAC you really don't want to disable the USB ports.
So delete this bit...
#Force max current to USB
max_usb_current=0
I have to take into account that although an optical cable will not need "burning in" my DAC hasn't yet got many hours on it, and so, technically at least, it's going to get even better.
I bunged my favourite Rostropovich JS Bach Cello Suites on and it sounded rather good. It's lost some of the "rawness" I usually associate with the recording and has become a tad more polite. although not in a bad way. I think I'd just got used to hearing it the other way.
This new sound makes me smile.
At least, it does now that I've unleashed my secret weapon. I've rewritten the Volumio config.txt for the Pi4 with the help (all right, technically I cribbed some of his work) of our old mate Archimago. One extra I added myself was the shutting down of the USB ports as I'm not using them. Everything is throttled back and it was the extra 5% I wanted.
For anyone with a Pi4 who wants the new config.txt, here it is.
initramfs volumio.initrd
gpu_mem=16
max_usb_current=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
# Archimago's CRAAP Pi 4B Settings...
# h #ttp://archimago.blogspot.com/2020/10/musingshow-to-raspberry-pi-4-touch.html
# October 14, 2020
# CPU speed control - normally 1500MHz, min 600
arm_freq=1200
arm_freq_min=300
# CPU voltage control - SYSTEM DEPENDENT!
over_voltage=-3
over_voltage_min=-4
# SDRAM control, normally 3200 - again, watch system dependent voltage
sdram_freq=2400
sdram_freq_min=300
over_voltage_sdram=-3
core_freq_min=200
gpu_freq_min=200
gpu_mem = 256
# Keep it cooler! Throttle at max 75C.
temp_limit=75
#Overclocking Options
force_turbo=1
avoid_pwm_pll=1
sdram_schmoo=0x02000020
over_voltage_sdram_p=-5
over_voltage_sdram_i=-14
over_voltage_sdram_c=-6
disable_pvt=1
#Force max current to USB
max_usb_current=0
#HDMI Disable
hdmi_blanking=2
#New Power Saving
hdmi_ignore_hotplug=1
hdmi_ignore_composite=1
#### Volumio i2s setting below: do not alter ####
dtoverlay=hifiberry-digi-pro
gpu_mem=16
max_usb_current=1
dtparam=audio=on
audio_pwm_mode=2
dtparam=i2c_arm=on
disable_splash=1
hdmi_force_hotplug=1
# Archimago's CRAAP Pi 4B Settings...
# h #ttp://archimago.blogspot.com/2020/10/musingshow-to-raspberry-pi-4-touch.html
# October 14, 2020
# CPU speed control - normally 1500MHz, min 600
arm_freq=1200
arm_freq_min=300
# CPU voltage control - SYSTEM DEPENDENT!
over_voltage=-3
over_voltage_min=-4
# SDRAM control, normally 3200 - again, watch system dependent voltage
sdram_freq=2400
sdram_freq_min=300
over_voltage_sdram=-3
core_freq_min=200
gpu_freq_min=200
gpu_mem = 256
# Keep it cooler! Throttle at max 75C.
temp_limit=75
#Overclocking Options
force_turbo=1
avoid_pwm_pll=1
sdram_schmoo=0x02000020
over_voltage_sdram_p=-5
over_voltage_sdram_i=-14
over_voltage_sdram_c=-6
disable_pvt=1
#Force max current to USB
max_usb_current=0
#HDMI Disable
hdmi_blanking=2
#New Power Saving
hdmi_ignore_hotplug=1
hdmi_ignore_composite=1
#### Volumio i2s setting below: do not alter ####
dtoverlay=hifiberry-digi-pro
If you're tempted to give it a go don't forget that if you're using a USB DAC you really don't want to disable the USB ports.
So delete this bit...
#Force max current to USB
max_usb_current=0